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[bi3mw]

it is still said that there is a biological or balneological section of the book, as is it were an incontrovertible truth.

I would say that the division into the known sections was made only to have a classification at all. Probably nobody will take the designations of the individual sections literally. One only has a makeshift division of the sections and so can refer to them. Everyone then knows which part of the manuscript is meant. That is probably the whole point of the present division into named sections.

The only exception is probably the "herbological section". Here one could assume that the naming corresponds in the broadest sense to the actual content.